Turntable



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Dec.,8, 1925 1.564.827

J. S. CLAY wml msnz Filed Ana. 7, 1925 2 Sheets-Sheet 2 cla . \N v 4 x Q i fi E w Eli) Patented Dec. 8, 1925.

' JAME s sr nliiriiilrlt il i meme-1 wIseoNsIN, "retreats To FREEMAN ivrrekco. or RA'CINE, wIsooNsIN, -A' CORPORATION OF WISCONSIN.

v A p 1 1,564,827

ruizN'rliBLE.

To all "whom 'i tomay' concern: Be itknown that I, JAMES SPiiAiIlWI'AN CLAY, a citizen ofthe United Statesjjand resident of Racine, in theeoun't'yof' Racine and State of lvisconsin, have inventedcerwin new and useful Improvements in, Turntablesj' andjI do hereby declare that thefollo w'ing is afull, clear, and exact description thereof. I

This invention, relates to turntables and rsj;*pai-ti a1ar1y directed to .a' turntable to automobile trucks. 7 H 7 In building bperations, it is "frequently necessary 1 to conduct the truck loading or dumping and, backing in a, very limited space. For example, infsome ,Statesroad builders are li'equired to "confine their operations to one side of the road'only andthus arenot allowedsuflicient roomin which to turnthei'r tigucks. I,

This inv ntion is magma to. provide turntables for trucks which will, permit. the use of trucks in a very lliinited space, which is reversible and is adapted to receivel'the truck from either endfwhich is easily'operated by oneman toquickly turn a heavily loaded truck, ;and which of extremely rugged. and relatively simple construction, andis not likely to .be damaged even under the severe use to which these devices will beput.

Further objects are to provide a turn table which is equipped with a pair of structural steel'runways which aretiltable and are carried in unloaded condition upon spring pressed caps located substantially centrally of the runways which permit easy tilting thereof, and which, when loaded, are

carried bystrong transverse beams spaced a material distanceapart to thus give a wide range for centering. a V H "Further objectsare to provide a,t urntable which is eqi ippechwith friction latches to hold the runways temporarily in tilted position, andwhich is sogconstructe d that a truck may be driven'upon the runway, balancing feetbeing provided to.aid in' ,the initial balancing, and which, when the truck is driven from the runways, the-friction latcheswi'll: 'retain'th'e runways in a tilting position for the fnextftruck. r

jAnje bodiment of -the inventio'nlis shown in the accompanying drawings, in. which 2 Figure l is a side elevation of the turn: table".

Figure 2 is a pl an view th ereof.

Figiire'B is anbnlarged transverse sectifonal' view. i V

'F'giire Iis asct'ionai viewtake'n oii" the line. of iigure 3 with the correspond ing runwayomitted. v

Referring to thedrawi iigsj it will be'seen that runways fare provided a'nd are constrhcted of stifuctui al steel. These runways are jr'ii'n'ed' ii te'rvals 7 of transverse chaniiel iron bracing members 2" and. are "preferably flared at theirends, s. hq niin F e 2- The er iu f y b'e constri1ctecl of angle ,irons 3 positioned t, p'pesit f id s a d. ,joi lh a sh Steel 119 -1 re e ably the. ha in r n 3 are reenforced by upper channel irons 5 which are securely riveted thereto, as shown in Figure 3.

the groundso as to permit dragging of the turntable into the position" desired, I The base jplate f7 has a channel iron 9 riveted thereto along each of its side edges, as'shown most clearly inFigure 3, andis provided with inwardly spaced fangle' irons 1O paralleling the ,flhannellironsfi), as shown in FigurQlB. The ends offthe base, as shown in Fi u e" wf r i11i Y d 1with renewing chane lliion gli' pa l nw rd y. o e upturIiedpOrti ns'S', sueh upturned ,ends bei iix e e a ly ra d.by,Im ns 2 1 mbet 12mS bW LinI aere Bet n h ngle, irons 19,, fa. vvcup shtloed raceway 13- is provided, 'as-shfown' mostjclearly in 'Figure 3 and this. cupeshapeid fi a'ceway "has I. its .uptu nediflange' riveted to the angle irons, 10. he i 'medi 'p a n'qf 11 3 91 1 1 shaped membenga 'is'fri vto. the base plate .7. fBrfritblL, a strengthening plate let is interposed, as shown in? Figure 3.

. W thi the b r. ay, n in e rese- Way is t e dl 'fids siinilai'lrt r e cup-shaped. 'B'e weenthese members a and are riveted thereto. The inner member 15, as shown 1n Figure 3, is preferably provided with a circular upper flanged mem-- ber 18 in order to strengthen and reenforce it, and the beams 17 are directly secured to the flange of this member, as shown in Figure 3, thus giving a very rigid attachment between these beams and the member 15. An I-beam 19 (see Figures 2 and 3,) is positioned within the member and is attached to the beams 17. This I-beam has its central web expanded at its center portion to receive the center pin'or bolt 20 of the turntable, as shown in Figure 3. Obviously,if desired, two of these bolts may be provided.

The bolt 20 extends through the I-beam 19 and is screwed into a bearing plate 21 at its lower end. This bearing plate cont acts with a bearing plate 22 carried by the member 13 and preferably a retaining member 23 provided with an inwardly projecting flange is also carried by the member 13 and overhangs a correspondingly contoured portion of the plate 21'thus preventing separation of the parts, this construction being shown inFigure 3.. The plates 21 and 22 are preferably of steel and brass. The transverse beams 17 are of I-beam section and are relatively deep at their central portions. They are provided with integral outwardly projecting ends 24which are positioned beneath the runways 1, as shown in Figures 3 and 4. The runways are normally held out of contact with the arms 24 of the space transverse beams when the runways are unloaded. This is accomplished by means of a pair of spring chairs carried between the transverse beams 17 as shown in Figures 3 and 4.

The construction of these spring chairs is shown most clearly in Figure 4 from which it will be seen that a shortcross channel-shaped member or beam 25 rests upon the flanges of the transverse beams 17 and have their ends riveted to the webs of such beams. These members are each provided with a pair of side flanges 26 which are joined by means of transverse intermediate flanges 27 to define a rectangular open top compartment. Preferably four upwardly pro ecting lugs 28 are formed integrally with the members 25 and receive the lower ends of compression springs 29. The upper ends of compression springs are received by tapered pins 30 formed integrally with the caps 31, such caps being provided with an upwardly extending 1 pointed portion 32.

Thesecaps 31 support the runways when they are unloaded. This is preferably accomplished by providing recesses in the angle irons 3 of the runways, as shown in Figure 3, which receive the pointed portions 32 of these caps. These points of support are centrally of the longitudinal dimensions of the runways so that they are substantially perfectly balanced on these spring chairs.

It is to be noted in Figure 3 that the runways have been shown in their depressed position as when loaded while in the imaginary line in Figure 4 the runways have been indicated as unloaded.

It is to be noted from Figure 4 that the runways 1 and each preferably consists of a plunger having a tapered front end 33 which is supported by means of links 34. Its rear end is guided by a bracket 35 and a compression'spring 36 is positioned between the bracket and the head of the plunger to urge the plungcrs towards each other, as shown in Figure 1. These plungers contact with the ends 24 of the transverse beams 17, such ends being preferably made with a solid or smooth portion 37 against which the friction latches bear. If desired, this flat surface may obviously be formed by inserting a block of material between the upper and lower flanges of the end portions 24, although preferably the portions 37 are integral with the portions 24.

In order to facilitate dragging of the turntable into place, a pair of eyes 38 are securely attached to the end channel irons 11 of the base, as shown in Figure 2, to receive the hook of a chain, for instance.

A pair of transverse shafts 39 are journaled on the under side of the runways and are provided with balancing feet 40 which are normally out of contact with the ground even when in their downwardly extended position, as shown on the left hand side of Figure 1. These balancing feet are rocked by means of short levers 41 secured to the shafts 39 and connected by means of rods 42with levers 43 pivoted at the ends of the runway opposite the corresponding feet, suitable stops 44 being provided for the levers 43.

In operating the reversible turntable, it is placed a short distance from the point where the building material is required, for instance on one side of a road if theturntable is used for roadway constructions. A loaded truck approaches a turntable and mounts .the runways. As the driver passes the nearest lever 43 he rocks it forwardly, as

a horizontal position. The truck is stopped while in this position and the driver dismounts and raising the balancing feet turns the loaded turntable until the truck is facing in the opposite direction. The truck is then backed off the turntable to the point where the load is dumped. The empty truck is then driven back over the turntable leaving the runways down in position to receive the next loaded truck. In these operations it is not necessary for the. truck at any time to use any part of the highway except the side occupied by the turntable.

It is obvious that the turntable may be used in other capacities and ways than that which is described in detail, but it is believed from this description that the use of the I turntable will be fully appreciated.

It will be seen that a turntable has been provided which will receive and turn loaded trucks, which may be easily operated, and which is reversible.

Although the invention has been described in considerable detail, it is to be understood that the invention may be variously embodied and is, therefore, to be limited only as claimed.

I claim:

1. A turntable comprising a supporting base, a pair of transverse beams positioned above said base, rotatable means interposed between said beams and base for permitting relative turning motion of said beams with reference to said base, a pair of longitudinally extending runways for the reception of the wheels of a truck, and yielding means for normally supporting said runways out of contact with said transverse beams.

2. A turntable comprising a supporting base, a pair of transverse beams positioned above said base, rotatable means interposed between said beams and base for permitting relative turning motion of said beams with reference to said base, a pair of longitudinally extending runways for the reception of the wheels of a truck, yielding means for normally supporting said runways out of contact with said transverse beams, and friction latches carried by said runways and adapted to yieldingly retain said runways in a tilted position. V 3. A turntable for trucks comprising a base, a pair of transverse beams positioned above said base, a ball bearing interposed between said beams and base and permitting said beams to turn with reference to said base, a pair of spring pressed caps positioned between said beams, a pair of run ways normally supported by said caps'and extending across said beams, said runways being adapted to receive the'wheels. of a truck, whereby said runways are depressed against the action of said springs and are supported by said transverse beams.

I 4. A turntable for trucks comprising abase, a pair of transverse beams positioned above said base, a ball bearing interposed between said beams and base and permitting said beams to turn with reference to said base, a pair of spring pressed caps posi-v tioned between said'beams, a pair of runways normally supported by said caps and extending across said beams, said runways being adapted to receive the wheels of a truck, whereby said runways are depressed against the action of said springs and are supported by said transverse beams, and a pair of rocking balancing feet carried adj acent the outer ends of saidrunway and,

adapted to be temporarily rocked down wardly.

5. A turntable for trucks comprising a base, a pair of transverse beams positioned above said base, a ball bearing interposed between said beams and base and permitting said beams to turn with reference to said base, a pair of spring pressed caps positioned between said beams, a pair of runways normally supported by said caps and extending across said beams, said runways being adapted to receive the wheels of a truck, whereby said runways are depressed against the action of said springs and are supported by said transverse beams, a pair of transverse shafts carried beneath the runways adjacent their outer ends. balancing feet carried by said shafts, a crank arm connected to each of said shafts, a lever mounted adjacent each end of said runways and on opposite sides there of, and. rods connecting said levers and said crank arm.

In testimony that I claim the foregoing I have hereunto set my hand at Racine, in the county of Racine and State of Wisconsin.

JAMES SPEAKMAN CLAY. 

